Electric solenoid.



No. 784,718. PATENTED MAR. 14, 1905. L. S. WALLE.

ELECTRIC SOLENOID.

APPLICATION FILED DEC. 29. 1903.

[7e Menta?? my if. fafa UNITED STATES LUDVIG S. VALLE, OF BROOKLYN, NEV YORK, ASSIGNOR TO FRlDTJOF Patented March 14, 1905.

PATENT OFFICE.D

JEBSEN, OF BERGEN, NORWAY.

ELECTRIC SOLENOIDu SPECIFICATION forming part of Letters Patent No. 784,718, dated :March 14, 1905.

Application iiled December 29, 1903. Serial No. 187,078

To (all whom, it 771/113/ concern:

Be it known that l, LUDWIG S. VVALLE, a subject of the King of Sweden and Norway, and a resident of Brooklyn, county of Kings,

5 State of New York, have invented certain new and useful Improvements in .Electric Solenoids, of which the following is a speci- Alication.

.lhis'invention relates to a solenoid oper- 1o ated by means of an electric coil or coils in which the current is used in only a portion of the coil to advance the solenoid-core, the object being to provide a form of solenoid in which the maximum amount of movement 15 may be imparted to the solenoid-core with the minimum amount of energizing-current. To accomplish this result, I provide a solenoid-coil of sufficient length to cover the required movement of the solenoid-core. This zo coil may be provided at intervals with connections which permit the current being used in a part of the coil at a time, or it may be made of a number of shorter coils which are each provided with separate terminals 2 5 connected to a switching device, by means of which the coils are automatically and successively connected into circuit as the core advances, the connection being so arranged that the coil immediately ahead of the core is 3o always energized, thus securing a continuous movement of the solenoid-core.

Referring to the drawings, I have shown in Figure 1 a side elevation, partly in section, of the device embodying my invention. I have 3 5 shown in connection with the solenoid and core a countcrweight connected thereto by means of a chain running over a sprocketwheel,which is in turn connected, by means of a shaft and gear, to the mechanism to be .lo driven. Fig. 2 is a plan view of Fig. 1.

At 1 is shown a solenoid-core of soft iron, and at 2 a counterweight heavier than the solenoid-core 1 and being connected thereto by a chain 3 running over a sprocket 4, which is 1,5 mounted on a shaft 5, supported in suitable bearings 6. On this shaft is a gear 7, meshing with a gear 8 on a shaft 9, connected to the mechanism to be driven. rent ilows, the mechanism stands in the posi- Vis cut o'llf.

When no curtion shown in the drawings; but as soon as switch 11, which may be of any suitable construction7 is closed current vflows from 10, which represents any suitable source of current, to the contact 12 through the sliding contact 13, carried by the counterweight 2, through a contact-piece to line 14 to the upper coil 15 and line 1G to the generator 10. These contact-pieces may be made a part of a guide for the counternf'eight, as shown in the drawings. This advances the core 1 to the center of coil 1.5 and at the same time raises the counterweight 2, cutting out the current in coil 15, but connecting in the next successive coil,thus advancing the core again. This continues until the switch 11 is opened or until the core reaches its lowest 'position and the counterweight the upper position, where the circuit is cut out automatically by the contact 18 passing beyond the connection to the lowest coil, when if switch 11 is opened the counterweight will bring the core to the upper' position, as explained.

It will be understood that the particular form of mechanism or means used to connect and transmit the motion of the solenoid-core to the mechanism to be driven forms no part of this invention, as it must of necessity be constructed to meet the requirements of the particular machine with which it is used. The samealso applies to the counterweight, which is shown as a convenient and simple method of returning the solenoid-core to its upper position when the energizing-current The switching device could be carried by the core itself or by a mechanism con-- trolled by the core, il desired. Ti th this in view l do not limit myself to' the particular design of mechanism or detail of construction shown, from which it will be evident that many changes can be made adapting it to many uses without departing from the scope of my invention l/Vhat 1 claim isl. 1n an electric solenoid, the combination of a solenoid-core, a solenoid-coil, a counterweight operatively connected to the solenoid-core to return the same to its initial position when the current is cut out from the solenoid-coil, and a contact member forminga guide for said counterweight and adapted to control the current in said coil, substantially as described.

2. In an electric solenoid, the combination o f a solenoid-core, a solenoid-coil having portions thereof adapted to be energized by an electric current, a counterweight operatively c onnected to the solenoid-core to return the same to its initial position when the current is cut out lfrom the solenoid-coil, and a contact member forming a guide for said counterweight and adapted to control the current in said coil, substantially as described,

3. In an electric solenoid, the combination of a solenoid-core, a series of solenoid-coils,

adapted to be energized by an electric current, a counterweight operatively connected to the solenoid-core to return the same to its initial position when the current is cut out from the solenoid-coil, and a contact member forming a guide for said counterweight and adapted to control the current in said coils, substantially as described.

el. ln an electric solenoid, the combination of a solenoid-core, a solenoid-coil having` portions thereof adapted to be energized by an electric current, a counterweiglit operatively connected to the solenoid-core to return the same to its initial position when the current is cut out from the solenoid-coil, and a contact member forming a guide for said counterweight and adapted to connect successive portions of said coil into circuit, substantially as described.

5. ln an electric solenoid, the combination of a solenoid-core, a series of solenoid-coils adapted to be energized by an electric current, a counterweight operatively connected to the solenoid-core to return the same to its initial position when the current is cut out from the solenoid-coils, and a contact member forming a guide for said counterweiglit and containing a series of contacts Afor controlling the current in the said series of solenoid-coils, substantially as described.

6. ln an electric solenoid, the combination of a solenoid-core, a solenoid-coil having portions thereof adapted to be energized by an electric current to advance the solenoid-core, a counterweight operatively connected to the solenoid-core for .returning the saine to its initial position when the current ceases to lflow in thesolenoid-coil, and a circuit-closing` device carried by saidv counterweight to connect said coils successively into circuit as the core advances.

7. In an electric solenoid, the combination of a solenoid-core, a solenoid-coil having portions thereof adapted to be energized by an electric current to advance the solenoid-core, a counterweight operatively connected to tbe solenoid-core for returning the same to its initial position when the current ceases to flow in the solenoid-coil, a circuit-closing dovice carried by said counterweiglit to connect said coils successively into circuit as the core advances, and a circuit-breaking device operating in conjunction with the solenoidcore to open the circuit in the solenoid-coil at a predetermined point allowing` the counterweight to return the core toits initial position.

8. ln an electric solenoid, the combination with a solenoid-core, of a series of solenoidcoils, a series of contacts for connecting` said coils to an energizing source of current, a counterweight carrying a circuit-closing device operating in conjunction with said contacts to energize a number of said coils for advancing said core.

Signed at New York, in the county of New York and State of New York, this 10th day of December, A. D. 1903.

LUDVIG S. WALLE.

Witnesses LEWIS J. DooLiTTLE, Fnlnraoiv JnnsnN. 

